CN110698149A - High-corrosion-resistance marine cement cementing material and preparation method thereof - Google Patents
High-corrosion-resistance marine cement cementing material and preparation method thereof Download PDFInfo
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- CN110698149A CN110698149A CN201911112564.3A CN201911112564A CN110698149A CN 110698149 A CN110698149 A CN 110698149A CN 201911112564 A CN201911112564 A CN 201911112564A CN 110698149 A CN110698149 A CN 110698149A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
- C08F283/065—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals on to unsaturated polyethers, polyoxymethylenes or polyacetals
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/24—Sea water resistance
Abstract
The invention relates to the field of buildings, in particular to a high-corrosion-resistance marine cement cementing material and a preparation method thereof, wherein 20-25 parts of wollastonite; 80-100 parts of sulphoaluminate cement; 30-50 parts of nano hydrotalcite-like compound; 20-30 parts of fibers; 80-100 parts of coral reef sand; 50-60 parts of polyacrylamide; 20-30 parts of modified acrylic emulsion; 10-15 parts of an additive; the invention aims to overcome the defects of the prior art and provides a high-corrosion-resistance marine cement cementing material and a preparation method thereof, and the cementing material has the characteristics of good mechanical strength, durability and corrosion resistance, improved breaking strength, improved cement density, better flocculation property, capability of reducing friction resistance between liquids, excellent impermeability, high early strength and high later strength.
Description
Technical Field
The invention relates to the field of buildings, in particular to a high-corrosion-resistance marine cement cementing material and a preparation method thereof.
Background
The cement concrete is a traditional building material, but the traditional concrete with lower strength and single function can not meet the requirements of large-scale structures under special conditions such as marine environment, and none of various maritime works structures built in the world at present, such as a cross-sea bridge, a port and wharf, a submarine tunnel, a coastal high speed, an offshore oil drilling platform, a dock and the like, use reinforced concrete as a main building material and a structural material. The coastline of China is as long as 32000 kilometers, the consumption of concrete is increased rapidly along with the rapid development of national economy and the comprehensive development of infrastructure construction, and the marine structure still takes reinforced concrete materials as the main raw materials in a quite long time in the future.
The marine concrete is widely applied to harbors, wharfs, flood banks and other projects exposed to seawater erosion, and is easily damaged to shorten the durability thereof due to the periodic contact with seawater and the physical and chemical actions of seawater or sea fog, or the actions of sea wave impact, sea sand scouring and the like, so that the main reasons for causing the marine concrete damage are as follows: corrosion of steel bars, freezing damage in cold climates, physicochemical effects of environmental erosion, and the like. According to statistics, the global economic loss caused by seawater corrosion exceeds billions of dollars every year, and Cl is generated in marine environment-And SO4 2-Ions enter the concrete and are accumulated on the surface of the steel bar to promote the steel bar to generate electrochemical corrosion, so that the internal part of the concrete is locally expanded, the concrete is swelled and cracked after stress concentration, and the durability of the concrete is deteriorated.
A great deal of facts show that China has a large number of ocean projects, severe damage occurs in the life period far below the design life period, some ocean projects need to be overhauled or rebuilt within 10-20 years, and some ocean projects need to be completely replaced even within 3-5 years. These important concrete structures are severely aged before they reach their useful life and have to be very costly to repair and rebuild.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a high-corrosion-resistance marine cement cementing material and a preparation method thereof, and the cementing material has the characteristics of good mechanical strength, durability and corrosion resistance, improved breaking strength, improved cement density, better flocculation property, capability of reducing friction resistance between liquids, excellent impermeability, high early strength and high later strength.
The technical scheme of the invention is realized by the following modes:
the high-corrosion-resistance marine cement cementing material comprises the following raw materials in parts by weight:
20-25 parts of wollastonite;
80-100 parts of sulphoaluminate cement;
30-50 parts of nano hydrotalcite-like compound;
20-30 parts of fibers;
80-100 parts of coral reef sand;
50-60 parts of polyacrylamide;
20-30 parts of modified acrylic emulsion;
10-15 parts of an additive.
The silicon ash is a byproduct collected from industrial waste gas generated in ferrosilicon smelting, and the granularity of the silicon ash is 5-10 mu m.
The sulphoaluminate cement comprises the following main chemical components:
the nano hydrotalcite-like compound is one or more than one of lithium aluminum hydrotalcite-like compound, magnesium aluminum hydrotalcite-like compound, zinc magnesium aluminum hydrotalcite-like compound or zinc aluminum hydrotalcite-like compound.
The fiber is a special-shaped steel fiber, namely a wave-shaped steel fiber, an end hook type steel fiber, an arch type steel fiber, a milling type steel fiber or a shearing type steel fiber.
The coral reef sand is natural coral reef sand, and the granularity is 0-20 mm.
The modified acrylic emulsion is formed by diluting stock solution of the modified acrylic emulsion and fresh water, and the mass ratio of the stock solution of the modified acrylic emulsion to the fresh water is 1: 4-5.
The additive is composed of a water reducing agent, a surfactant, a rust inhibitor, a retarder and a defoaming agent, and the mass ratio of the water reducing agent to the retarder is as follows: surfactant (b): a rust inhibitor: retarder: defoaming agent = 1-5: 3-6: 2-4: 1-5: 3 to 5.
The water reducer is a modified powder polycarboxylic acid high-performance water reducer, and the preparation method comprises the following steps: mixing cinnamic acid, acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid in a weight ratio of cinnamic acid, acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid = 0.25: 5: 0.3 is respectively dissolved in 3 parts by weight of deionized water to prepare monomer solutions, 0.25 part by weight of ammonium persulfate is dissolved in 3 parts by weight of deionized water to prepare initiator solutions, a four-neck flask containing 1 part by weight of prenyl polyoxyethylene ether, 3 parts by weight of deionized water, a stirrer and a constant pressure dropping funnel is placed in a water bath kettle, the temperature is raised to 85 ℃, the cinnamic acid monomer solution, the acrylic acid monomer solution, the 2-acrylamide-2-methylpropanesulfonic acid monomer solution and the ammonium persulfate initiator solution are uniformly dropped, the dropping rate of the monomer solutions is 1-1.5 mL/min, the dropping rate of the initiator solutions is 0.5-0.8 mL/min, and the temperature is continuously kept for 2 hours after the dropping is finished; after the reaction is finished, adjusting the temperature to be below 40 ℃, dropwise adding NaOH with the mass fraction of 20% while stirring, and adjusting the pH value to be 7-8 to obtain the polycarboxylic acid water reducer; adding 1 part by weight of nano calcium, nano aluminum and nano silicon into a polycarboxylate superplasticizer at the temperature of 45 ℃, stirring for 30 minutes, drying, and crushing at low temperature to obtain the modified powder polycarboxylate superplasticizer.
The surfactant is a phosphorus amphoteric surfactant, and the preparation method of the surfactant comprises the following steps: 2.662 parts by weight of methyl triphenyl phosphonium bromide is taken to be added into 25 parts by weight of distilled water, 2.715 parts by weight of sodium dodecyl benzene sulfonate is added into the distilled water, the mixture is placed into a magnetic stirrer and is rapidly stirred for 4 hours, the mixture is kept still for liquid separation, the lower layer of viscous liquid is taken, and the composite is the methyl triphenyl phosphonium dodecyl benzene sulfonate.
2.662 parts by weight of ethyl triphenyl phosphonium bromide is taken to be added into 25 parts by weight of distilled water, 2.715 parts by weight of sodium dodecyl benzene sulfonate is added into the distilled water, the mixture is placed into a magnetic stirrer and is rapidly stirred for 4 hours, the mixture is kept still for liquid separation, the lower layer of viscous liquid is taken, and the composite is the ethyl triphenyl phosphonium dodecyl benzene sulfonate.
2.662 parts by weight of propyl triphenyl phosphonium bromide is taken to be added into 25 parts by weight of distilled water, 2.715 parts by weight of sodium dodecyl benzene sulfonate is added into the distilled water, the mixture is placed into a magnetic stirrer and is rapidly stirred for 4 hours, the mixture is kept still for liquid separation, the lower layer of viscous liquid is taken, and the composite is the propyl triphenyl phosphonium dodecyl benzene sulfonate.
2.662 parts by weight of butyl triphenyl phosphonium bromide is taken to be added into 25 parts by weight of distilled water, 2.715 parts by weight of sodium dodecyl benzene sulfonate is added into the distilled water, the mixture is placed into a magnetic stirrer and is rapidly stirred for 4 hours, the mixture is kept still for liquid separation, the lower layer of viscous liquid is taken, and the composite is the butyl triphenyl phosphonium dodecyl benzene sulfonate.
And uniformly mixing the dodecylbenzene sulfonic acid methyl triphenyl phosphine, the dodecylbenzene sulfonic acid ethyl triphenyl phosphine, the dodecylbenzene sulfonic acid propyl triphenyl phosphine and the dodecylbenzene sulfonic acid butyl triphenyl phosphine to obtain the phosphorus amphoteric surfactant.
The rust inhibitor is a roasted layered double hydroxide rust inhibitor, namely, 36-40 parts by mass of magnesium-aluminum hydrotalcite is put into a high-temperature silicon-molybdenum furnace to be roasted at 500-800 ℃, the temperature rise rate is 4 ℃/min, the temperature is kept for 5 hours, then the magnesium-aluminum hydrotalcite is cooled for 30 minutes and taken out, and then the mixture is cooled to room temperature, crushed and ground and passes through a 250-mesh sieve; and sequentially adding 5-7 parts by weight of dimethylethanolamine, 18-20 parts by weight of diethanolamine and 23-25 parts by weight of saturated calcium hydroxide aqueous solution, and stirring for 30 minutes to obtain the rust inhibitor.
The retarder is formed by compounding sodium gluconate and white sugar according to the mass ratio of 3: 2.
The defoaming agent is an organic silicon polyether composite defoaming agent.
The preparation method of the high corrosion resistance marine cement cementing material comprises the following steps:
(1) mixing wollastonite, sulphoaluminate cement, nano hydrotalcite and coral reef sand in parts by weight, crushing, and calcining at 600-800 ℃;
(2) placing the mixture into a stirring barrel after calcining, sequentially adding the fibers, the polyacrylamide, the modified acrylic emulsion and the additive in parts by weight, and stirring the mixture by a high-shear stirrer; the shearing speed is 500-1000 rpm, and the time is 10-15 min;
(3) and drying the obtained material in a dryer at the temperature of 80-150 ℃ for 30-60 min, and crushing the dried material into powder to obtain the high-corrosion-resistance marine cement cementing material.
Compared with the prior art, the invention has the prominent substantive characteristics and remarkable progress that:
1. wollastonite (wollastonite) Is Ca3〔Si3O9And (c) a temperature sensor. Triclinic system belongs to the single-chain silicate mineral. Typically in the form of a sheet, radial or fibrous mass. White and slightly grayish. Glass luster, pearl luster on cleavage surface. The hardness is 4.5-5.0. The wollastonite has good reinforcing property, and the wollastonite is added into the coating, so that the toughness and the durability of the coating can be improved, and the surface smoothness and the good glossiness of the coating can be kept. And the wollastonite has high hardness (Mohs hardness is 4.5-5), low thermal expansion coefficient and good weather resistance. Wollastonite has good hardness and wear resistance, so that the cement disclosed by the invention has better mechanical strength, durability and corrosion resistance. The wollastonite in the microfiber shape can be mutually overlapped with a cement hydration product to effectively promote compactness, improve the formation and development of microcracks and form an irregular net structure, so that the structure is more compact, crack expansion can be effectively prevented, and the breaking strength is improved.
2. A sulphoaluminate cement, a high-temperature-resistant,
the calcium sulphoaluminate mineral has high hydration activity and can form a large amount of ettringite and alumina gel in the early stage, so that the sulphoaluminate cement used for seawater corrosion resisting engineering has the excellent characteristics of quick hardening, early strength, good durability and the like.
3. Hydrotalcite-like compounds, also known as Layered Double Hydroxides (LDHs), are a class of layered anionic nanoclays. The hydrotalcite-like compound has many characteristics, the hydration product of cement, namely the monosulfuric hydrated calcium sulfoaluminate (AFm), has a typical layered structure, and the lithium-aluminum hydrotalcite-like compound with a three-dimensional micro-nano structure synthesized by a hydrothermal method is found to have a promoting effect on the clinker of the sulphoaluminate cement, and the smaller the particle size is, the more remarkable the enhancing effect on the hydration and mechanical properties of the clinker of the sulphoaluminate cement adopted by the invention is. The alkaline strength of the hydrotalcite-like laminate is basically consistent with that of the low-valent metal hydroxide in the composition, and the hydration hardening process of the sulphoaluminate cement clinker is influenced.
4. The fiber of the invention is special-shaped steel fiber, which is doped in cement, after the cement is hydrated and expanded, the pre-stress is formed in the cement under the action of the limited expansion of the steel fiber, and the self-stress steel fiber reinforced cement is formed. The comprehensive effect is that the tensile bearing capacity of the test piece is greatly improved, which is much safer and more reliable than the method of improving the self-stress value by increasing the expansion and deformation capacity of the cement alone to improve the crack resistance and bearing capacity of the structure. The self-stress cement mainly aims at improving bearing load, has the effect of reducing cement cracks, and has the characteristics of superior impermeability, high early strength and later strength in rapid hardening and the like compared with common cement.
The breaking strength, the shearing strength, the splitting tensile strength and the bending toughness of the cement can be obviously improved, the dry shrinkage value is reduced, and the early plastic cracking is also obviously reduced; the fracture toughness of the cement is improved, the thickness of the pavement or the bridge deck is reduced, and the wind blowing resistance, the drying shrinkage cracking resistance and the plastic shrinkage cracking resistance of the cement in the early curing stage are improved.
5. The coral reef sand is prepared by mixing the coral reef sand,
the invention is marine cement, sea, perennial high temperature, high humidity, high salt, heavy rain, strong wind, insolation, strong ultraviolet radiation, and the natural environment is harsh; in such an environment, durability deterioration of concrete becomes a significant problem. In addition, the sea is far away from the continent, and the preparation of the common sandstone aggregate freshwater concrete wastes time and labor, has low efficiency and high cost due to the long-distance marine transportation of raw materials, the complex marine meteorological conditions and the like. Over 95% of islands are coral reefs, and the coral reefs have huge sand storage, are easy to exploit and have low cost. Therefore, the cement is prepared by using seawater and coral aggregates, the coral aggregates are loose and light, the porosity of the coral aggregates is high and can generally reach 35-45%, the saturated water absorption is generally 20-30%, the cylinder pressure strength is generally 4.5-9.5 MPa, and the crushing index is generally 24-38%.
6. The polyacrylamide is selected to be added into the marine cement gelled material, and is a water-soluble high molecular polymer, the long molecular chain structure of an organic high molecular polymer and the self-rotation property of a bond or a chain segment in macromolecules, so that the density of cement can be improved in the cement gelled material, the cement gelled material has better flocculation property, and the friction resistance between liquids can be reduced.
7. The modified acrylic emulsion can replace butylbenzene emulsion, so that the production process gets rid of the problem that high pressure is required during butylbenzene emulsion synthesis.
8. Additive:
(1) the water reducing agent is a polycarboxylate water reducing agent, and is synthesized by taking ammonium persulfate as an initiator and taking acrylic acid, cinnamic acid, isopentenol polyoxyethylene ether and 2-acrylamide-2-methylpropanesulfonic acid as reaction monomers through free radical copolymerization.
In the water reducing agent, an initiator can influence the reaction rate and the molecular weight of the generated polycarboxylic acid water reducing agent, when the initiator content is low, the initiator for initiating monomer polymerization is too little due to consumption of a polymerization inhibitor, so that the product has too high molecular weight, a large amount of monomers cannot participate in the reaction, and the water reducing performance of the water reducing agent is poor. With the increase of the content of the initiator, the polymerization degree of the water reducing agent is reduced, the chain length is moderate, and the water reducing agent can well play a role. When the dosage of the initiator exceeds a certain proportion, the molecular weight of the product is too small, the steric hindrance is reduced, the effect of dispersing cement particles cannot be well played, and the fluidity of slurry is poor. The invention adopts ammonium persulfate as an initiator, the persulfate is decomposed to generate free radicals, then the free radicals excite monomers to form monomer free radicals, the free radicals cannot enter a molecular formula in the process, and ammonia gas cannot be generated by adjusting pH and adding NaOH.
According to the invention, cinnamic acid is added into a polycarboxylic acid water reducing agent, the cinnamic acid contains benzene rings and carboxyl, the steric hindrance of polycarboxylic acid molecules is increased, so that the adsorption force between concrete layers is weakened, and more water reducing agents can play a role in dispersing, thereby greatly improving the fluidity of slurry.
The polycarboxylic acid water reducing agent selects the acrylic acid because of the acid-ether ratio, which is the ratio of the amount of acrylic acid and the amount of macromolecular monomer foaming substances, and influences the side chain density and the charge density of the polycarboxylic acid water reducing agent, so the acid-ether ratio has important influence on the polycarboxylic acid water reducing agent. The acid-ether ratio of the cement paste is 5:1, and the flow property of the cement paste is optimal.
The reaction temperature of the polycarboxylic acid water reducing agent is also important, when the reaction temperature is low, the rate of generating free radicals by decomposing the initiator is low, the polymerization reaction rate is slow, a large amount of monomer residues exist, and the synthesized water reducing agent has low molecular weight and poor performance. When the reaction temperature is too high, the half-life period of the initiator is short, the initiation rate is high, the monomers easy to polymerize are rapidly polymerized, the functional group of the water reducing agent is single, and the dispersibility is poor. The selection temperature of the invention is 85 ℃, the concrete net slurry fluidity is highest, and the retentivity is good.
The selected polycarboxylate superplasticizer is a comb-shaped high-molecular compound, contains carboxyl, hydroxyl, benzene ring and other groups in a molecular structure, and has the advantages of no environmental pollution, good adjustability of structure and performance, high water-reducing rate, good plasticity retention and the like.
(2) The invention relates to a surfactant, which is a phosphorus amphoteric surfactant, and is prepared by reacting four cationic surfactants such as alkyl triphenyl phosphonium bromide and the like with a sodium dodecyl benzene sulfonate anionic surfactant to prepare four ionic liquid phosphorus amphoteric surfactants and mixing the four ionic liquid phosphorus amphoteric surfactants. The simple anionic and cationic surfactants have no obvious grinding aid effect, the ionic liquid prepared by the reaction of the phosphorus surfactant and the sodium dodecyl benzene sulfonate anionic surfactant shows excellent grinding aid effect, and the effect obtained by mixing the four ionic liquid type phosphorus amphoteric surfactants together is better. The phosphorus amphoteric surfactant can change the physicochemical property of the particle surface, reduce the free energy, weaken the surface strength, effectively inhibit the reaggregation of particles and reduce the ball pasting phenomenon, thereby improving the grinding efficiency.
(3) The novel roasted layered double hydroxide rust inhibitor is prepared by compounding the magnesium-aluminum hydrotalcite serving as a main material with dimethyl ethanolamine, diethanol amine and a saturated calcium hydroxide aqueous solution, wherein steel bar corrosion is an important cause for the durability deterioration of a concrete structure, and chloride corrosion is one of important factors for causing the corrosion of steel bars in concrete. When the chloride ions of the chloride ions reach a certain amount, even if the concrete reinforcing steel bar is wrapped by strong alkali, the chloride ions can dissolve a passivation film on the surface of the reinforcing steel bar, so that the reinforcing steel bar is corroded. Therefore, the use of rust inhibiting materials has become an important measure for inhibiting the corrosion of steel reinforcement inside concrete structures.
Because the layered double hydroxide has stronger structure memory effect and anion exchange capacity, the crystallinity of the calcined magnalium hydrotalcite is obviously reduced, and the invention is added into the reinforced concrete, the potential value of the reinforcing steel bar basically keeps stable, which indicates that the reinforcing steel bar passive film is good.
Cl-The atomic radius of the gel is small, the gel can easily enter the surface of the C-S-H gel, and the gel is adsorbed with cement hydration products with positive electricity under the action of the coulomb attraction of the charges to balance the charges. The ion adsorption capacity in the electric double layer is mainly determined by the surface area of the C — S — H gel, the electric potential between the compact layer and the diffusion layer. At the same time, Ca in the pore solution is found2+Determines the potential between the diffusion layers and thereby affects the physical adsorption of chloride ions. 23-25 parts of saturated calcium hydroxide solution is mixed in the rust inhibitor, and Ca in the pore solution is added after the cement-based material is mixed in the rust inhibitor2+Is effectively increased in concentrationThe physical adsorption capacity of the C-S-H gel is improved.
(4) The retarder is formed by compounding sodium gluconate and white sugar according to the mass ratio of 3:2, improves the workability of concrete and has excellent slump retaining capacity. Can be used in alkaline medium of cement hydration product and free Ca2+Forming unstable complex, and reducing Ca in liquid phase at early stage of hydration2+The concentration of the water-soluble polymer delays the crystallization of CH, and meanwhile, the water-soluble polymer can be adsorbed on the surface of cement hydrated particles to generate hydrogen bonds with oxygen ions in a silicon-rich layer, so that a layer of protective film is formed on the surface of the cement particles to inhibit the hydration reaction of the cement particles, and the delayed coagulation effect is generated. As the hydration process proceeds, the unstable complex decomposes the cement automatically, and the hydration continues to proceed normally without affecting the later hydration of the cement. Can improve the dispersibility of the water reducing agent, prolong the setting time of concrete and does not influence the development of the strength of the concrete.
(5) The defoaming agent adopts the organic silicon polyether composite defoaming agent, has self-emulsifying property, can automatically recover the emulsion state after being sterilized at high temperature, can not be subjected to emulsion breaking, oil floating and layering in a foaming system, has excellent performances of high temperature resistance, high pressure resistance, acid resistance, alkali resistance, shear resistance, quick defoaming and lasting foam inhibition, is uniformly dispersed in the foaming system, has obvious defoaming and foam inhibition effects, and can meet the defoaming and foam inhibition requirements with high performance-price ratio by using less dosage compared with the common organic silicon defoaming agent with the same specification.
Detailed Description
The present invention is further described with reference to the following embodiments, which are only preferred embodiments of the present invention and not intended to limit the present invention in other forms, and any person skilled in the art may change or modify the technical content disclosed above into equivalent embodiments with equivalent changes. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the scope of the present invention, unless they depart from the technical spirit of the present invention.
Example 1
The high-corrosion-resistance marine cement cementing material comprises the following raw materials in parts by weight: 20 parts of wollastonite; 80 parts of sulphoaluminate cement; 30 parts of nano hydrotalcite-like compound; 20 parts of fiber; 80 parts of coral reef sand; 50 parts of polyacrylamide; 20 parts of modified acrylic emulsion; 10 parts of an additive.
The preparation method of the high corrosion resistance marine cement cementing material comprises the following steps:
(1) mixing wollastonite, sulphoaluminate cement, nano hydrotalcite and coral reef sand in parts by weight, crushing, and calcining at 600-800 ℃;
(2) placing the mixture into a stirring barrel after calcining, sequentially adding the fibers, the polyacrylamide, the modified acrylic emulsion and the additive in parts by weight, and stirring the mixture by a high-shear stirrer; the shearing speed is 500rpm, and the time is 10 min;
(3) and drying the obtained material in a dryer at the temperature of 80 ℃ for 30min, and crushing the dried material into powder to obtain the high-corrosion-resistance marine cement cementing material.
Example 2
The high-corrosion-resistance marine cement cementing material comprises the following raw materials in parts by weight: 25 parts of wollastonite; 100 parts of sulphoaluminate cement; 50 parts of nano hydrotalcite-like compound; 30 parts of fiber; 100 parts of coral reef sand; 60 parts of polyacrylamide; 30 parts of modified acrylic emulsion; 15 parts of an additive.
The preparation method of the high corrosion resistance marine cement cementing material comprises the following steps:
(1) mixing wollastonite, sulphoaluminate cement, nano hydrotalcite and coral reef sand in parts by weight, crushing and calcining at 800 ℃;
(2) placing the mixture into a stirring barrel after calcining, sequentially adding the fibers, the polyacrylamide, the modified acrylic emulsion and the additive in parts by weight, and stirring the mixture by a high-shear stirrer; the shearing speed is 1000rpm, and the time is 15 min;
(3) and drying the obtained material in a dryer at the temperature of 150 ℃ for 60min, and crushing the dried material into powder to obtain the high-corrosion-resistance marine cement cementing material.
Example 3
The high-corrosion-resistance marine cement cementing material comprises the following raw materials in parts by weight: 23 parts of wollastonite; 90 parts of sulphoaluminate cement; 40 parts of nano hydrotalcite-like compound; 25 parts of fiber; 90 parts of coral reef sand; 55 parts of polyacrylamide; 25 parts of modified acrylic emulsion; 13 parts of an additive.
The preparation method of the high corrosion resistance marine cement cementing material comprises the following steps:
(1) mixing wollastonite, sulphoaluminate cement, nano hydrotalcite and coral reef sand in parts by weight, crushing and calcining at 700 ℃;
(2) placing the mixture into a stirring barrel after calcining, sequentially adding the fibers, the polyacrylamide, the modified acrylic emulsion and the additive in parts by weight, and stirring the mixture by a high-shear stirrer; the shearing speed is 800rpm, and the time is 13 min;
(3) and drying the obtained material in a dryer at the temperature of 100 ℃ for 45min, and crushing the dried material into powder to obtain the high-corrosion-resistance marine cement cementing material.
Example 4
The high-corrosion-resistance marine cement cementing material comprises the following raw materials in parts by weight: 24 parts of wollastonite; 95 parts of sulphoaluminate cement; 45 parts of nano hydrotalcite-like compound; 28 parts of fiber; 95 parts of coral reef sand; 58 parts of polyacrylamide; 28 parts of modified acrylic emulsion; 12 parts of an additive.
The preparation method of the high corrosion resistance marine cement cementing material comprises the following steps:
(1) mixing wollastonite, sulphoaluminate cement, nano hydrotalcite and coral reef sand in parts by weight, crushing and calcining at 750 ℃;
(2) placing the mixture into a stirring barrel after calcining, sequentially adding the fibers, the polyacrylamide, the modified acrylic emulsion and the additive in parts by weight, and stirring the mixture by a high-shear stirrer; the shearing speed is 800rpm, and the time is 14 min;
(3) and drying the obtained material in a dryer at the temperature of 120 ℃ for 50min, and crushing the dried material into powder to obtain the high-corrosion-resistance marine cement cementing material.
The material properties were as follows:
Claims (7)
1. the high-corrosion-resistance marine cement cementing material is characterized by comprising the following raw materials in parts by weight:
20-25 parts of wollastonite;
80-100 parts of sulphoaluminate cement;
30-50 parts of nano hydrotalcite-like compound;
20-30 parts of fibers;
80-100 parts of coral reef sand;
50-60 parts of polyacrylamide;
20-30 parts of modified acrylic emulsion;
10-15 parts of an additive;
the preparation method of the high corrosion resistance marine cement cementing material comprises the following steps:
(1) mixing wollastonite, sulphoaluminate cement, nano hydrotalcite and coral reef sand in parts by weight, crushing, and calcining at 600-800 ℃;
(2) placing the mixture into a stirring barrel after calcining, sequentially adding the fibers, the polyacrylamide, the modified acrylic emulsion and the additive in parts by weight, and stirring the mixture by a high-shear stirrer; the shearing speed is 500-1000 rpm, and the time is 10-15 min;
(3) and drying the obtained material in a dryer at the temperature of 80-150 ℃ for 30-60 min, and crushing the dried material into powder to obtain the high-corrosion-resistance marine cement cementing material.
2. The high corrosion resistance marine cement gelled material as claimed in claim 1, wherein the silica fume is a byproduct collected from ferrosilicon smelting industrial waste gas, and the particle size is 5-10 μm.
3. The high corrosion resistance marine cement cementitious material according to claim 1, wherein the nano hydrotalcite-like compound is one or more of lithium aluminum hydrotalcite-like compound, magnesium aluminum hydrotalcite-like compound, zinc magnesium aluminum hydrotalcite-like compound or zinc aluminum hydrotalcite-like compound.
4. The high corrosion resistance marine cement cementitious material according to claim 1, wherein said fibers are profiled steel fibers, such as corrugated steel fibers, end hook steel fibers, bow steel fibers, milled steel fibers or sheared steel fibers.
5. The high-corrosion-resistance marine cement cementing material as claimed in claim 1, wherein the coral reef sand is natural coral reef sand, and the particle size is 1-20 mm.
6. The high-corrosion-resistance marine cement binding material as claimed in claim 1, wherein the modified acrylic emulsion is formed by diluting stock solution of the modified acrylic emulsion with fresh water, and the mass ratio of the stock solution of the modified acrylic emulsion to the fresh water is 1: 4-5.
7. The high-corrosion-resistance marine cement gelled material as claimed in claim 1, wherein the additive comprises a water reducing agent, a surfactant, a rust inhibitor, a retarder and a defoaming agent, and the mass ratio of the water reducing agent to the rust inhibitor is as follows: surfactant (b): a rust inhibitor: retarder: defoaming agent = 1-5: 3-6: 2-4: 1-5: 3 to 5.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111892341A (en) * | 2020-08-12 | 2020-11-06 | 黄志芳 | Corrosion-resistant composite cement and preparation process thereof |
| CN111995307A (en) * | 2020-08-31 | 2020-11-27 | 湖北工业大学 | Preparation method of protective coating material for marine peripheral buildings |
| CN114163191A (en) * | 2021-12-11 | 2022-03-11 | 深圳市恒星建材有限公司 | Early-strength self-compacting concrete and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100837809B1 (en) * | 2007-12-06 | 2008-06-13 | 충남대학교산학협력단 | Manufacturing methods of multi -functional marine ecosystem friendly concrete for recycling of resource utilizing coal ash, reaction irritant, water glass and new materials for reinforcement |
| CN103253911A (en) * | 2013-04-24 | 2013-08-21 | 中国石油大学(北京) | Ocean-engineering anti-erosion cement-based composite material |
| CN103910510A (en) * | 2012-12-31 | 2014-07-09 | 中交武汉港湾工程设计研究院有限公司 | Scouring-resistant wear-resistant ocean engineering concrete |
| CN107857542A (en) * | 2017-10-27 | 2018-03-30 | 广西横县恒丰建材有限责任公司 | The production method of cement for construction in sea wind and wave resistance mortar |
| CN108947412A (en) * | 2018-09-05 | 2018-12-07 | 河海大学 | A kind of ecology resistance anti-corrosion maritime concrete of rust type seawater sea sand and preparation method thereof |
| CN109293279A (en) * | 2018-12-07 | 2019-02-01 | 中建商品混凝土有限公司 | A kind of anticorrosive compound additive of maritime concrete |
-
2019
- 2019-11-14 CN CN201911112564.3A patent/CN110698149A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100837809B1 (en) * | 2007-12-06 | 2008-06-13 | 충남대학교산학협력단 | Manufacturing methods of multi -functional marine ecosystem friendly concrete for recycling of resource utilizing coal ash, reaction irritant, water glass and new materials for reinforcement |
| CN103910510A (en) * | 2012-12-31 | 2014-07-09 | 中交武汉港湾工程设计研究院有限公司 | Scouring-resistant wear-resistant ocean engineering concrete |
| CN103253911A (en) * | 2013-04-24 | 2013-08-21 | 中国石油大学(北京) | Ocean-engineering anti-erosion cement-based composite material |
| CN107857542A (en) * | 2017-10-27 | 2018-03-30 | 广西横县恒丰建材有限责任公司 | The production method of cement for construction in sea wind and wave resistance mortar |
| CN108947412A (en) * | 2018-09-05 | 2018-12-07 | 河海大学 | A kind of ecology resistance anti-corrosion maritime concrete of rust type seawater sea sand and preparation method thereof |
| CN109293279A (en) * | 2018-12-07 | 2019-02-01 | 中建商品混凝土有限公司 | A kind of anticorrosive compound additive of maritime concrete |
Non-Patent Citations (1)
| Title |
|---|
| 王可: "纳米锂铝类水滑石对硫铝酸盐水泥水化硬化影响研究", 《建材发展导向》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111892341A (en) * | 2020-08-12 | 2020-11-06 | 黄志芳 | Corrosion-resistant composite cement and preparation process thereof |
| CN111892341B (en) * | 2020-08-12 | 2022-12-13 | 冀东水泥铜川有限公司 | Corrosion-resistant composite cement and preparation process thereof |
| CN111995307A (en) * | 2020-08-31 | 2020-11-27 | 湖北工业大学 | Preparation method of protective coating material for marine peripheral buildings |
| CN114163191A (en) * | 2021-12-11 | 2022-03-11 | 深圳市恒星建材有限公司 | Early-strength self-compacting concrete and preparation method thereof |
| CN114163191B (en) * | 2021-12-11 | 2022-11-11 | 深圳市恒星建材有限公司 | Early-strength self-compacting concrete and preparation method thereof |
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